A brick of mass M has been placed on a rubber cushion of mass m. Together they are sliding to the right at constant velocity on an ice-covered parking lot.
a) Draw a free-body diagram of the brick and identify each force acting on it.
b) Draw a free-body diagram of the cushion and identify each froce acting on it
c) Identify all of the action-reaction pairs of forces in the brick-cushion-planet system.